Method for removing carbon, nitrogen and phosphorus in sewage cooperatively

Abstract

The invention provides a method for removing carbon, nitrogen and phosphorus in sewage cooperatively. The method comprises the following specific steps: nitrite type denitrifying dephosphatation floating sludge and anammox biofilms are commonly placed in an anaerobic-anoxic composite sequencing batch reactor (SBR); under an anaerobic condition, nitrite type denitrifying dephosphatation bacteria are used to remove organic carbon in sludge and release phosphate through decomposition for the following excessive phosphorus-uptake; under an anoxic condition, anammox bacteria are used to remove ammonia nitrogen and nitrite in sewage and nitrite type denitrifying dephosphatation bacteria are used to remove nitrite and nitrate and uptake excessive phosphorus to form sludge with rich phosphorus; and after the mud-water separation of the precipitation period, the residual sludge with rich phosphorus is discharged to achieve the aim of dephosphorization. The method of the invention utilizes the synergy of nitrite type denitrifying dephosphatation bacteria and anammox bacteria in the same reactor to realize that carbon, nitrogen and phosphorus in the sewage with low organic carbon and high nitrogen and phosphorus can be removed simultaneously; and the method has the advantages of low carbon source demand, low aeration energy consumption and the like.

Description

Synergistic method for removing carbon, nitrogen and phosphorus in sewage technical field The invention relates to the technical field of sewage biological nitrogen and phosphorus removal, in particular to a method for synergistically removing organic carbon, nitrogen and phosphorus in sewage by nitrite denitrification and anaerobic ammonium oxidation. Background technique Biological nitrogen and phosphorus removal technology is the most economical and effective method to solve nitrogen and phosphorus pollution in sewage. However, when traditional biological nitrogen and phosphorus removal technologies are used to treat sewage containing low organic carbon and high nitrogen and phosphorus, the effect of nitrogen and phosphorus removal is caused by insufficient carbon sources. decline. The anaerobic ammonium oxidation and nitrite type denitrification dephosphorization technologies developed in recent years have greatly reduced the demand for carbon sources, for example, se...

AI Technical Summary

Problems solved by technology

The technical problem to be solved by the present invention is: in order to overcome the fact that anaerobic ammonium oxidation cannot effectively remove carbon and phosphorus and nitrite type denitrification phosphorus removal cannot directly and effectively remove ammonia, and both are difficult to independently realize effective simultaneous denitrification and phosphorus removal Insufficient, provide a method for synergistic removal of carbon, nitrogen and phosphorus by nitrite denitrification and anaerobic ammonium oxidation